Sharing costs in multi-unit buildings can be very challenging. These costs are influenced
by predetermined adjustment factors based on experience and estimates, typically provided
by the cost-sharing contractor. The identification of these factors could have been
subjective. New regulations for costing ensure objectivity and thus more realistic values,
which are set computationally. In this thesis, we considered a multi-apartment house,
determined the correction factors using the construction physics software, we calculated
the indicative cost of each apartment and suggested improvements which would reduce the
costs. By changing the parameters in the building physics program and calculating the
return on investment based on annual savings we found that it would be wise to renovate
the roof and facade to reduce heat losses up to 40 %. Replacing the heating system and the
power source would recover the cost of the investment in just two years.
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